Display screen or portion thereof with graphical user interface



FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with a graphical user interface; and,

FIG. 2 is a front view of a second embodiment of a display screen or portion thereof with a graphical user interface.

The use of the color black represents contrast only and not the claimed color.

The outer broken line perimeter of a display screen or portion thereof, as well as the words, numbers, symbols, and portions of the graphical user interface illustrate portions of the article, and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with graphical user interface, substantially as shown and described. 